[The Rooster]

I need to get a scale still, I do want to track my weight loss.

I just went upstairs and piled the seatbelts, hardware and seatbacks onto the bottom seat cussion and lifted it, and it felt more like 35-40 lbs. I think my biggest single gain will be the switch to the carbon fiber rear deck, plastic rear glass and getting rid of the spoiler, rear wiper, wiper motor and rear brake light.

And the metal in the seatbacks don't add any structure to the car, I think the point is mainly to provide structure to the seat to support passengers, and also to prevent items in the trunk from flying right through the seats and into the passenger compartment in the case of an accident.